Transmission line decoupling simulation acceleration method and system

Abstract

The invention discloses a transmission line decoupling simulation acceleration method and system, and the method comprises the steps: carrying out the decoupling of transmission lines between internal combustion engines and between the internal combustion engines and energy storage through the natural decoupling characteristics of the transmission lines, and obtaining a transmission line decoupling characteristic equation; constructing a transmission line decoupling circuit model through the transmission line decoupling characteristic equation; and based on a transmission line decoupling circuit model, independent simulation solution is carried out through voltage and current information interaction. According to the method, the calculation complexity of reconstruction and inversion calculation of a high-order matrix is avoided, the calculation amount during system calculation is reduced, and the electromagnetic transient simulation speed is increased.

Description

Technical Field

[0001] The present invention relates to the technical field of power grid simulation, and in particular to a transmission line decoupling simulation acceleration method and system. Background Art

[0002] The combined system of internal combustion engine and energy storage helps to improve energy efficiency and enhance the flexibility of the system. However, when the internal combustion engine and energy storage system are combined, due to their complex electrical and thermal characteristics, they usually bring complex simulation problems. At present, the electromagnetic transient simulation of the combined system of internal combustion engine and energy storage generally adopts the modeling of full system coupling, which requires that each component and line in the system must be calculated at the same simulation step. When simulating a large-scale system, this full coupling simulation method has an exponential increase in system calculation complexity due to the high number of nodes, making the simulation time very long and the efficiency very low. For the electromagnetic transient simulation of a large internal combustion engine and energy storage combined system, if the natural decoupling characteristics of the transmission line can be used to convert the large system into several small systems, the amount of calculation of the system matrix operation can be reduced, which will play an important role in improving the overall simulation efficiency of the system. However, due to the limitation between the simulation step and the distance of the transmission line due to the natural decoupling of the transmission line, and the information interaction difference between the decoupled systems in the simulation step, the simulation accuracy will be reduced. It is necessary to construct a mathematical equation that accurately describes the characteristics of the transmission line and construct its discretized decoupling circuit model. Summary of the invention

[0003] The purpose of this section is to summarize some aspects of embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and the invention title of this application to avoid blurring the purpose of this section, the specification abstract and the invention title, and such simplifications or omissions cannot be used to limit the scope of the present invention.

[0004] In view of the above existing problems, the present invention is proposed.

[0005] Therefore, the present invention provides a transmission line decoupling simulation acceleration method and system to solve the problem of slow electromagnetic transient simulation speed of the existing internal combustion engine and energy storage combined system.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0007] In a first aspect, the present invention provides a transmission line decoupling simulation acceleration method, comprising:

[0008] By utilizing the natural decoupling characteristics of transmission lines, the transmission lines between internal combustion engines and between internal combustion engines and energy storage are decoupled, and the transmission line decoupling characteristic equation is obtained;

[0009] Construct a transmission line decoupling circuit model through the transmission line decoupling characteristic equation;

[0010] Based on the transmission line decoupling circuit model, independent simulation and solution are performed through the interaction of voltage and current information.

[0011] As a preferred solution of the transmission line decoupling simulation acceleration method of the present invention, wherein:

[0012] Decoupling the transmission lines between the internal combustion engines and between the internal combustion engines and the energy storage comprises the following steps:

[0013] Considering the distributed parameter characteristics of the transmission line, mathematical equations are used to describe the transmission lines between different internal combustion engines and between the internal combustion engine and the energy storage;

[0014] The mathematical equation is discretized by using numerical integral discretization to obtain a discretized circuit equation;

[0015] Considering the distributed parameter characteristics of the transmission line, the transmission line decoupling characteristic equation is obtained.

[0016] As a preferred solution of the transmission line decoupling simulation acceleration method of the present invention, wherein:

[0017] The mathematical equations are used to describe the transmission lines between different internal combustion engines and between the internal combustion engine and the energy storage, including establishing telegraph equations to describe the changes of voltage and current on the transmission line with time and space and defining the characteristic impedance of the transmission line and the electromagnetic wave propagation speed.

[0018] As a preferred solution of the transmission line decoupling simulation acceleration method of the present invention, wherein:

[0019] The telegraph equation is established to describe the change of voltage and current on the transmission line with time and space as follows:

[0020]

[0021] The characteristic impedance and electromagnetic wave propagation speed of the defined transmission line are expressed as:

[0022]

[0023] Where v(x, t) represents the voltage at position x along the transmission line at time t, i(x, t) represents the current at position x along the transmission line at time t, L′ represents the inductance per unit length of the transmission line, and C′ represents the capacitance per unit length of the transmission line. represents the rate of change along the transmission line direction, represents the rate of change over time, Z C represents the characteristic impedance of the transmission line, It represents the propagation speed of electromagnetic waves in the transmission line.

[0024] As a preferred solution of the transmission line decoupling simulation acceleration method of the present invention, wherein:

[0025] The method of using numerical integral discretization to discretize the mathematical equation to obtain a discretized circuit equation includes discretizing the mathematical equation by trapezoidal integral discretization to obtain a discretized circuit equation, wherein the discretized circuit equation is expressed as:

[0026]

[0027] Among them, y(t) represents the output of the system at time t, y(t-Δt) represents the output of the system at time t-Δt, Δt represents the discretized time interval, A represents the system matrix, x(t) represents the input of the system at time t, and x(t-Δt) represents the input of the system at time t-Δt.

[0028] As a preferred solution of the transmission line decoupling simulation acceleration method of the present invention, wherein:

[0029] The transmission line decoupling characteristic equation is obtained by considering the distributed parameter characteristics of the transmission line, including decoupling the discretized equation by introducing a time delay τ. The transmission line decoupling characteristic equation is expressed as:

[0030] v k (t-τ)+Z C ·i km (t-τ)=v m (t)+Z C ·(-i mk (t))

[0031]

[0032] Among them, v k (t-τ) represents the voltage of node k at time t-τ, i km (t-τ) represents the current flowing from node k to node m, ν m (t) represents the voltage of node m at time t, i mk (t) represents the current flowing from node m to node k at time t, I k (t-τ) represents the total current of node k at time t-τ, v m (t-τ) represents the voltage of node m at time t-τ, i mk (t-τ) represents the value of the current flowing from node m to node k at time t-τ.

[0033] In a second aspect, the present invention provides a transmission line decoupling simulation acceleration system, comprising:

[0034] A decoupling module is used to decouple the transmission lines between internal combustion engines and between internal combustion engines and energy storage by utilizing the natural decoupling characteristics of the transmission lines, and obtain a transmission line decoupling characteristic equation;

[0035] A construction module, used for constructing a transmission line decoupling circuit model through a transmission line decoupling characteristic equation;

[0036] The solution module is used to perform independent simulation and solution based on the transmission line decoupling circuit model through voltage and current information interaction.

[0037] As a preferred solution of the transmission line decoupling simulation acceleration system of the present invention, wherein:

[0038] The transmission line decoupling circuit model comprises:

[0039] A decomposition module, used for decomposing the transmission line decoupling circuit model into a first subsystem and a second subsystem, the first subsystem and the second subsystem are independent of each other, and each subsystem includes one or more internal combustion engines and related energy storage devices;

[0040] The interactive module is used when the first subsystem is a controlled voltage source and the second subsystem is a controlled current source, the voltage value of the controlled voltage source is the terminal voltage of the controlled current source, and the current value of the controlled current source is the current value flowing through the controlled voltage source.

[0041] In a third aspect, the present invention provides a computing device, comprising:

[0042] Memory, used to store programs;

[0043] The processor is used to execute the computer executable instructions, and the computer executable instructions, when executed by the processor, implement the steps of the transmission line decoupling simulation acceleration method.

[0044] In a fourth aspect, the present invention provides a computer-readable storage medium, comprising: when the program is executed by a processor, the steps of implementing the transmission line decoupling simulation acceleration method are implemented.

[0045] Beneficial effects of the present invention: The present invention utilizes the natural decoupling characteristics of transmission lines to decouple transmission lines between internal combustion engines and between internal combustion engines and energy storage, making the large system equivalent to several small systems, avoiding the reconstruction of high-order matrices and the computational complexity of inverse calculations, greatly reducing the amount of calculation during system solution, and improving the electromagnetic transient simulation speed. In addition, since there is no circuit connection between the subsystems and only information interaction is performed, it has a certain parallel processing capability, which can further improve the simulation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0047] Figure 1 A basic flow chart of a transmission line decoupling simulation acceleration method provided by one embodiment of the present invention;

[0048] Figure 2 A transmission line decoupling circuit model diagram of a transmission line decoupling simulation acceleration method provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0049] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the drawings of the specification. Obviously, the described embodiments are part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary persons in the art without creative work should fall within the scope of protection of the present invention.

[0050] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0051] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0052] The present invention is described in detail with reference to schematic diagrams. When describing the embodiments of the present invention, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0053] At the same time, in the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "upper, lower, inner and outer" are based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first, second or third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0054] In the present invention, unless otherwise clearly specified and limited, the terms "install, connect, connect" should be understood in a broad sense, for example: it can be a fixed connection, a detachable connection or an integral connection; it can also be a mechanical connection, an electrical connection or a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0055] Example 1

[0056] Reference Figure 1 , is an embodiment of the present invention, and provides a transmission line decoupling simulation acceleration method, such as Figure 1 As shown, the following steps are included:

[0057] S1: Using the natural decoupling characteristics of the transmission line, the transmission lines between internal combustion engines and between internal combustion engines and energy storage are decoupled to obtain the transmission line decoupling characteristic equation;

[0058] In the embodiment of the present application, before decoupling the transmission lines between the internal combustion engines and between the internal combustion engines and the energy storage, the following steps are included:

[0059] Considering the distributed parameter characteristics of the transmission line, mathematical equations are used to describe the transmission lines between different internal combustion engines and between the internal combustion engine and the energy storage.

[0060] The mathematical equation is discretized by using numerical integral discretization to obtain a discretized circuit equation;

[0061] Considering the distributed parameter characteristics of the transmission line, the transmission line decoupling characteristic equation is obtained;

[0062] Based on the transmission line decoupling characteristic equation, a transmission line decoupling circuit model is obtained.

[0063] It should be noted that it is necessary to establish a mathematical model to describe the behavior of the transmission line based on physical laws (such as Maxwell's equations, Kirchhoff's laws, etc.). These equations usually include the relationship between voltage and current and time, as well as the resistance, inductance, capacitance and admittance parameters distributed along the transmission line.

[0064] It should be noted that since continuous differential equations are usually difficult to solve directly, the step of numerical discretization transforms the differential equations that are originally difficult to solve directly into a set of algebraic equations or a set of difference equations that can be processed by computers.

[0065] It should be noted that, based on the discretized equations, the distributed parameter characteristics of the transmission line (such as the characteristic impedance and propagation constant of the uniform transmission line) are further used to derive the decoupling equations that can reflect the independent characteristics of each section of the transmission line. This process may involve transforming the original equations, such as using Laplace transform or Fourier transform, to facilitate analysis.

[0066] In an embodiment of the present application, mathematical equations are used to describe the transmission lines between different internal combustion engines and between an internal combustion engine and energy storage, including describing the relationship between the changes in voltage and current on the transmission line with space and time, and defining the characteristic impedance of the transmission line and the electromagnetic wave propagation speed.

[0067] In the embodiment of the present application, the relationship between the voltage and current on the transmission line over space and time is expressed as:

[0068]

[0069] In the embodiment of the present application, the characteristic impedance of the transmission line and the electromagnetic wave propagation speed are defined as:

[0070]

[0071] Where v(x, t) represents the voltage at position x along the transmission line at time t, i(x, t) represents the current at position x along the transmission line at time t, L′ represents the inductance per unit length of the transmission line, and C′ represents the capacitance per unit length of the transmission line. represents the rate of change along the transmission line direction, represents the rate of change over time, Z C represents the characteristic impedance of the transmission line, It represents the propagation speed of electromagnetic waves in the transmission line.

[0072] In an optional embodiment, the numerical integration discretization may be the Euler method of first order accuracy, the improved Euler method of second order accuracy, or the trapezoidal integration method;

[0073] In an optional embodiment, the first-order accurate Euler method is an explicit numerical integration method for approximately solving ordinary differential equations (ODEs) by using the slope at the current time point to predict the state at the next time point.

[0074] In an optional embodiment, the modified Euler method (also known as Heun's Method) is an explicit numerical integration method that improves accuracy by using the average of the slopes at the current time point and the predicted next time point.

[0075] In the embodiment of the present application, the continuous-time differential equations describing the dynamic behavior of the system are discretized by the trapezoidal integration method to discretize the circuit equations;

[0076] In the embodiment of the present application, the dynamic behavior of the system is described as follows:

[0077]

[0078] Among them, y(t) represents the state of the system at time t, represents the rate of change of the system state over time, A represents the system matrix, and x(t) represents the input of the system at time t.

[0079] In the embodiment of the present application, the discretized circuit equation is expressed as:

[0080]

[0081] Among them, y(t) represents the output of the system at time t, y(t-Δt) represents the output of the system at time t-Δt, Δt represents the discretized time interval, and x(t-Δt) represents the input of the system at time t-Δt.

[0082] It should be noted that the trapezoidal integral discretization formula is a method that discretizes the dynamic behavior of the system and then uses it for numerical calculation.

[0083] It should be noted that the trapezoidal integration method is an implicit method with absolute stability, which means that it performs well when dealing with stiff systems (i.e., systems with multiple time scales and some parts that change very quickly). In contrast, the explicit first-order Euler method and the modified Euler method are prone to numerical instability when the step size is large or the simulation is long.

[0084] In the embodiment of the present application, by introducing a time delay τ, the discretized equation is decoupled to obtain a transmission line decoupling characteristic equation;

[0085] In the embodiment of the present application, the transmission line decoupling characteristic equation is expressed as:

[0086] ν k (t-τ)+Z C ·i km (t-τ)=ν m (t)+Z C ·(-i mk (t))

[0087]

[0088] Among them, v k (t-τ) represents the voltage of node k at time t-τ, i km (t-τ) represents the current flowing from node k to node m, v m (t) represents the voltage of node m at time t, i mk (t) represents the current flowing from node m to node k at time t, I k (t-τ) represents the total current of node k at time t-τ, v m (t-τ) represents the voltage of node m at time t-τ, i mk (t-τ) represents the value of the current flowing from node m to node k at time t-τ.

[0089] S2: Construct a transmission line decoupling circuit model through the transmission line decoupling characteristic equation;

[0090] In the embodiment of the present application, in the first subsystem, the voltage v of the node k k (t) through the characteristic impedance Z C and the current i flowing to node m km (t) interact with each other, and at the same time pass through the ideal current source I k (t-τ) is the total current after feedback time delay;

[0091] In the second subsystem, the voltage v at node m m (t) through the characteristic impedance Z C and the current i flowing to node k mk (t) interact with each other, and at the same time pass through the ideal current source I m (t-τ) is the total current after feedback time delay;

[0092] In the embodiment of the present application, a simplified equivalent circuit model is established, which retains the dynamic characteristics of each subsystem but removes unnecessary complexity so that each subsystem can be simulated and analyzed independently.

[0093] S3: Based on the transmission line decoupling circuit model, independent simulation and solution are performed through voltage and current information interaction.

[0094] In an embodiment of the present application, in a decoupled model, voltage and current information between different subsystems (eg, an internal combustion engine and an energy storage system) interact, and this information includes node voltages and currents, and their time delays.

[0095] In an embodiment of the present application, each subsystem can be solved independently based on its own voltage and current information, as well as interaction information with other subsystems, which can simplify the calculation and improve the simulation efficiency through parallel computing.

[0096] It should be noted that although each subsystem is electrically independent, they still need to exchange information through signals such as voltage and current. This information interaction allows the systems to work together while maintaining independence and can achieve parallel processing, thereby improving the efficiency of the simulation.

[0097] It should be noted that transmission line decoupling disconnects the circuit connections between systems and enables independent simulation of each subsystem only through signal interaction. The original high-order matrix is ​​split into several small matrices for inversion operations, which greatly reduces the amount of calculation when solving the system, thereby improving the speed of electromagnetic transient simulation.

[0098] Furthermore, it also includes:

[0099] Memory, used to store programs;

[0100] A processor is used to load the program to execute the transmission line decoupling simulation acceleration method.

[0101] This embodiment also provides a computer-readable storage medium storing a program, and when the program is executed by a processor, the transmission line decoupling simulation acceleration method is implemented.

[0102] The storage medium proposed in this embodiment and the transmission line decoupling simulation acceleration method proposed in the above embodiment belong to the same inventive concept. The technical details not fully described in this embodiment can be referred to the above embodiment, and this embodiment has the same beneficial effects as the above embodiment.

[0103] Through the above description of the implementation methods, the technicians in the relevant field can clearly understand that the present invention can be implemented by means of software and necessary general hardware, and of course can also be implemented by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present invention is essentially or the part that contributes to the prior art can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, such as a computer floppy disk, read-only memory (ReadOnly, Memory, ROM), random access memory (RandomAccess Memory, RAM), flash memory (FLASH), hard disk or optical disk, etc., including a number of instructions for a computer device (which can be a personal computer, server, or network device, etc.) to perform the methods of various embodiments of the present invention.

[0104] Example 2

[0105] Reference Figure 2 , as an embodiment of the present invention, provides a transmission line decoupling simulation acceleration system, including a decoupling module, a building module and a solving module;

[0106] In the embodiment of the present application, the decoupling module utilizes the natural decoupling characteristics of the transmission line to decouple the transmission lines between the internal combustion engines and between the internal combustion engines and the energy storage, and obtains the transmission line decoupling characteristic equation;

[0107] In the embodiment of the present application, the construction module constructs a transmission line decoupling circuit model through a transmission line decoupling characteristic equation;

[0108] In the embodiment of the present application, the solution module performs independent simulation solution based on the transmission line decoupling circuit model through voltage and current information interaction.

[0109] In an embodiment of the present application, the building module includes a decomposition module, which decomposes the transmission line decoupling circuit model into a first subsystem and a second subsystem, the first subsystem and the second subsystem are independent of each other, and each subsystem includes one or more internal combustion engines and related energy storage devices;

[0110] In an embodiment of the present application, the solution module includes an interaction module, in which the first subsystem is a controlled voltage source, the second subsystem is a controlled current source, the voltage value of the controlled voltage source is the terminal voltage of the controlled current source, and the current value of the controlled current source is the current value flowing through the controlled voltage source.

[0111] like Figure 2 As shown, the circuit diagram on the left shows the situation at node k for the first subsystem, and the circuit diagram on the right shows the situation at node m for the second subsystem. Each node has a voltage source and an ideal current source, and the output of the ideal current source depends on the state of another node and the time delay.

[0112] like Figure 2 As shown, the circuit diagram on the left uses a voltage source v k (t) and resistance Z C , the voltage v at node k k (t) and the current i flowing from node k to node m km (t) interact with each other and pass through the ideal current source I k (t-τ) feeds the total current after time delay back into the system;

[0113] like Figure 2 As shown, the circuit diagram on the right uses a voltage source v m (t) and resistance Z C , the voltage v at node m m (t) and the current i flowing from node m to node kmk (t) interact with each other and pass through the ideal current source I m (t-τ) feeds the total current after time delay back into the system;

[0114] In the embodiments of the present application, it is clearly demonstrated how the voltage and current of each node affect each other through the transmission line, and the time delay of signal propagation is taken into account.

[0115] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A transmission line decoupling simulation acceleration method, characterized in that: include: By utilizing the natural decoupling characteristics of transmission lines, the transmission lines between internal combustion engines and between internal combustion engines and energy storage are decoupled, and the transmission line decoupling characteristic equation is obtained; Construct a transmission line decoupling circuit model through the transmission line decoupling characteristic equation; Based on the transmission line decoupling circuit model, independent simulation and solution are performed through the interaction of voltage and current information.

2. The transmission line decoupling simulation acceleration method according to claim 1, characterized in that: Decoupling the transmission lines between the internal combustion engines and between the internal combustion engines and the energy storage comprises the following steps: Considering the distributed parameter characteristics of the transmission line, mathematical equations are used to describe the transmission lines between different internal combustion engines and between the internal combustion engine and the energy storage; The mathematical equation is discretized by using numerical integral discretization to obtain a discretized circuit equation; Considering the distributed parameter characteristics of the transmission line, the transmission line decoupling characteristic equation is obtained.

3. The transmission line decoupling simulation acceleration method according to claim 1 or 2, characterized in that: The mathematical equations are used to describe the transmission lines between different internal combustion engines and between the internal combustion engine and the energy storage, including establishing telegraph equations to describe the changes of voltage and current on the transmission line with time and space and defining the characteristic impedance of the transmission line and the electromagnetic wave propagation speed.

4. The transmission line decoupling simulation acceleration method according to claim 3, characterized in that: The telegraph equation is established to describe the change of voltage and current on the transmission line with time and space as follows: The characteristic impedance and electromagnetic wave propagation speed of the defined transmission line are expressed as: Where v(x, t) represents the voltage at position x along the transmission line at time t, i(x, t) represents the current at position x along the transmission line at time t, L′ represents the inductance per unit length of the transmission line, and C′ represents the capacitance per unit length of the transmission line. represents the rate of change along the transmission line direction, represents the rate of change over time, Z C represents the characteristic impedance of the transmission line, It represents the propagation speed of electromagnetic waves in the transmission line.

5. The transmission line decoupling simulation acceleration method according to claim 4, characterized in that: The method of using numerical integral discretization to discretize the mathematical equation to obtain a discretized circuit equation includes discretizing the mathematical equation by trapezoidal integral discretization to obtain a discretized circuit equation, wherein the discretized circuit equation is expressed as: Among them, y(t) represents the output of the system at time t, y(t-Δt) represents the output of the system at time t-Δt, Δt represents the discretized time interval, A represents the system matrix, x(t) represents the input of the system at time t, and x(t-Δt) represents the input of the system at time t-Δt.

6. The transmission line decoupling simulation acceleration method according to claim 5, characterized in that: The transmission line decoupling characteristic equation is obtained by considering the distributed parameter characteristics of the transmission line, including decoupling the discretized equation by introducing a time delay τ. The transmission line decoupling characteristic equation is expressed as: v k (t-τ)+Z C ·i km (t-τ)=v m (t)+Z C ·(-i mk (t)) Among them, v k (t-τ) represents the voltage of node k at time t-τ, i km (t-τ) represents the current flowing from node k to node m, v m (t) represents the voltage of node m at time t, i mk (t) represents the current flowing from node m to node k at time t, I k (t-τ) represents the total current of node k at time t-τ, v m (t-τ) represents the voltage of node m at time t-τ, i mk (t-τ) represents the value of the current flowing from node m to node k at time t-τ.

7. A system based on the transmission line decoupling simulation acceleration method according to claim 1, characterized in that: A decoupling module is used to decouple the transmission lines between internal combustion engines and between internal combustion engines and energy storage by utilizing the natural decoupling characteristics of the transmission lines, and obtain a transmission line decoupling characteristic equation; A construction module, used for constructing a transmission line decoupling circuit model through a transmission line decoupling characteristic equation; The solution module is used to perform independent simulation and solution based on the transmission line decoupling circuit model through voltage and current information interaction.

8. The transmission line decoupling simulation acceleration system according to claim 7, characterized in that: The transmission line decoupling circuit model comprises: A decomposition module, used for decomposing the transmission line decoupling circuit model into a first subsystem and a second subsystem, the first subsystem and the second subsystem are independent of each other, and each subsystem includes one or more internal combustion engines and related energy storage devices; The interactive module is used when the first subsystem is a controlled voltage source and the second subsystem is a controlled current source, the voltage value of the controlled voltage source is the terminal voltage of the controlled current source, and the current value of the controlled current source is the current value flowing through the controlled voltage source.

9. An electronic device, characterized in that: include: Memory, used to store programs; A processor, used for loading the program to execute the steps of the transmission line decoupling simulation acceleration method according to any one of claims 1 to 6.

10. A computer-readable storage medium storing a program, characterized in that: When the program is executed by a processor, the steps of the transmission line decoupling simulation acceleration method according to any one of claims 1 to 6 are implemented.

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